Screw threads upon conical articles



(No Model.) 4 Sheets-Sheet 1.

J. J. CLAUSE.

MACHINE FOR CUTTING SCREW THREADS UPON GONIGAL ARTICLES.

No. 302,239. Patented July 22, 1884.-

A H v V I nfr: M J02; fCZa (No Model. 4 Sheets-Sheet 2.

J. J. CLAUSE.

I MACHINE FOR CUTTINGSGREW THREADS UPON GONIGAL ARTICLES. No. 302,239.Patented July 22, 1884.

N. PETERS. Pnowumo n hur. Washington. D c.

(No Model.) 4 Sheets-She8t 3( J. J. CLAUSE.

MAGHINE FOR CUTTING SCREW, THREADS UPON OONIGALARTIGLBS.

No. 302,239. Patented July 22, 1884.

lnvenfar:

Wz i kesses: M

J5&7i fazauw,

N PETERS. Phutwlimn n mr. Wnthmglcll. D C.

(No Model.) 4 Sheets-Sheet '4.

J. J. CLAUSE.

MACHINE FOR CUTTING SCREW THREADS UPON GONICAL ARTICLES. N0. 302,239. VPatented July 22, 1884.

I f0n ffiauw,

" erMaZ/WQ Uivrrnn Starts JOHN J. CLAUSE, OF CHICAGO, ILLIh OIS,ASSIGNOR TO HENRY V. LYMAN AND JAMES W'. VAIL, BOTH OF PORT WASHINGTON,\VISCONSIN.

MACHINE FOR CUTT ING SCREW-THREADS UPON CONICAL ARTICLES.

SPBQIFICATIGN forming part of Letters Patent No. 302,239, dated July 22,1884.

Application filed December 3, 1883. (No model.)

To aZZ whom it may concern:

Be it known that '1, JOHN J. OLAUsE, a citizen of the United States,residing in Chicago, in the county of Cook and State of Illinois,

have invented a new and useful Improvement in Machines for CuttingScrew-Threads upon Conical Articles, of which the following is aspecification.

The object of this invention is to provide a simple and durable machinefor rapidly cutting screw-threads upon the exterior conical surface ofbung-bushes forbarrels. These bung-bushes are ordinarily made of cast ormalleable iron, and repeated cuttings are re 1 5 quired to give thethreads the requisite depth.

In my invention the thread-cutting tool reciprocates from one end of thebung-bush to the other as the thread is being cut, and the bung issecured upon an inclined revolving 2O shaft or spindle, the inclinationof the shaft to the guide or shaft upon which thetool-h'olderreciprocates being the same as that of the conical surface of the bushto its axis, so that the surface of the bush which is presented to thecutting-tool will always be parallel to the line in which said toolreciprocates, thus obviating the necessity of employing any device torock or move the tool-holder transversely for the purpose of causing thetool to describe a line parallel to the conical surface of the bush assaid tool reciprocates. The depth of each successive cut is gaged by arevolving cam having a graduated series of operatingfaces, which in turnpress or hold the cuttingtool against the work while each cut is beingmade, each successive face causing the tool to cut deeper. This cam alsomoves the holder or carriage upon which the tool is mounted,

alternately first in contact with the leadingscrew, by which the forwardreciprocation of the tool is made while cutting the thread, and then incontact with a reversing-screw, by

, which the tool-holder and tool are moved back into position for thenext cut. The tool-hold- 5 or is of course provided with threads orfollowers to engage alternately with the leading and reversing screws,both of which revolve constantly, as well as the inclined shaft uponwhich the bush is secured or chucked. The

cam-Wheel has as many opefatingfaces as it is desired to make cuts uponthe bush, so that each revolution of the cam-wheel finishes a bush, andthe cam-wheel is provided with an inclined projection or cam on itsside, which at each complete revolution of the cam-wheel 5 5 engages aslide operating a clutch to stop the machine, so that the finished bushmay be removed and another placed in its stead.

Other features of myinvention consist in the novel construction andcombinations of 6 devices, as hereinafter more fully described, inconnection with the accompanying drawings, which form a part of thisspecification.

111 the drawings I have shown what I deem to be the best means ofpracticing my inven- 6 tion or of embodying it in a working machine,

In the accompanying drawings similar letters of reference indicate likeparts wherever used.

Figure 1 represents a plan view of my ma- 7o chine. Figs. 2 and 3 areside elevations looking from opposite sides of the machine. Fig.

4 is an end view. Fig. 5 is a cross-section showing the tool-holder andcam-wheel for operating the same in elevation. Figs. 6, 7, and 8 aresections on lines 6 6, 7 7, and 8 8, respectively, of Fig. 5. Fig. 9 isa central longitudinal section of the inclined shaft, showing means ofchucking the bush upon its end. Fig. 10 is a crosssection on line 10 108o of Fig. 9. Fig. 11 is a central longitudinal section of the clutch,and Figs. 12 and 13 are detail face views of the same.

In the drawings, A represents the frame of the machine, which may be ofany suitable 8 5 construction.

B is a shaft journaled in suitable hearings on the standards A. Looselymounted on this shaft B is the driving-pulley B, provided with thespur-gear B integral therewith. .90

C is the tool-holder, mounted on theshaft C so as to reciprocatethereon, and thus carry the cutting-tool c from one end of the bush tothe other, and also having a pivotal movement thereon to permit of thetoolbeing set closer to its work to increase the depth of eachsuccessive out.

D is the inclined shaft or spindle, on the end of which the conical bushD, to be threaded, is secured or held while the thread is being IOO cutthereon. The inclination of this shaft D is such that the surface orside of the bush D which is presented to the tool 0 as said shaftrevolves will be parallel to the line in which the tool 0reciprocates-that is to say, parallel to the shaft 0, on which thetoolholder reciprocates. By this means, it will be seen, though thethread is to be out upon a conical surface, the cuttingtool may reciprocate in a-right line, which very much simp1i fies the construction andoperation of the machine, as well increases its efficiency, and enablesit to perform its work at all times with positive certainty andperfection. The tool and tool-holder are reciprocated or carriedforward, while the thread is being cut, by means of a leading-screw, b,on the shaft 13, which engages with a follower or threaded block, Z),secured adjustably to the tool-holder by bolts If, when the tool-holderis moved or rocked, so as to bring the tool in contact with the bush.\Vhen one cut is finished, the tool-holder is reciproeated in theopposite direction, so as to bring the tool into position for the nextcut, by means of a reversing-screw, E, on the shaft E, engaging with afollower or threaded block, 0, secured to the toolholder on its underside. The tool is held or pressed against its work by means of a.cam-wheel, G,

having a graduated series of operating "faces or lugs, upon which therear end of the pivoted tool-holder rests, the tool-holder beingprovided with aleg or projection, g, curved to conform to the circularfaces 9 on the camwheel. The canrwheel is provided with as many faces orlugs r on the periphery of the cain-wheel as it is desired to makesuccessive cuts upon the bush to finish its thread to the requisitedepth. The lugs r are each of such length in relation to the projectiong on the tool-holder,the length of the bush to be threaded, the timingof the leading-screw I), the spindle l), and the canrwhcel, that each ofsaid lugs or cam-faces will hold the tool in contact with the bush justthe time required to make one complete cut from one end of the bush tothe other, when, by the revolution of the cam-wheel, the lug will becarried past the projection g, and said projection will then drop down.into the notches or spaces f, between the lugs g, and thus raise thetool a away from its work, and at the same time disengage the followerI) from the leading-screw, and engage the follower c with thereversing-screw E, and thus cause the tool holder to be moved back intoposition for the next cut. This rear end of the pivoted toolholder ismade heavier than the other, in order to cause it to drop down of itsown weight off the cam-faces g as the cam-wheel revolves. The nextsuceeding lug or cam face I being slightly higher than the first one,causes the tool 0 to cut a little deeper, and so on until the operationis completed.

The inclined spindle D is made hollow, and to its end is secured, bymeans of screw-threads or otherwise, a conical chuck-piece, d, adaptedto fit the interior conical surface or hole in the bush. The chuck-pieced is provided with four radial slots, (1, in which fit four wedges, (P,the outer edges of said wedges conforming to the conical hole in thebush, and the inner edges of said wedges conforming to the conical pin(1, by means of which the wedges are forced outward against the bush, soas to hold or chuck the same firmly in position on the revolving spindleD. The conical pin (1 is provided with screw-threads d", which engagewith corresponding screwthreads in the end of the hollow shaft D, andthe pin is operated or turned by means of a hand-wheel, d.

In order to adapt the machine to threadbushes or other conical-surfacedarticles of different lengths, I split the canrwheel G- or itsoperating-faeesg into two parts, 9 and 9, secured together by bolts g"passing through slots g so that by turning the one upon the other theoperatingfaces 9 may be lengthened, so as to increase the length thethreads will be out upon the bush before the tool-holder proj ection r/drops off the faces 9.

The cutting-tool c is adjustably secured in its holder 0 by means of aslotted bolt, 0, through the slot 0 of which the tool 0 and its socket cis inserted, so that the tool is firmly clamped between its socket c andthe cap a of the bolt by means of the threaded nut c".

The cam-wheel G is provided on one side with an inclined projection orcam, ll, which engages at each complete revolution of the cam-wheel,after the bush has been repeatedly cut and finished, with a slide, 71-,operating a clutch 71/, that engages with the clutch-hub 71 of the loosegear-wheel h on the shaft E, by which means the machine is automaticallystopped, so that the finished bush may be removed from the spindle 1)and be replaced by another. hen a new bush has been secured upon thespindle D, the machine is set in 1notion by pulling the lever h, whichoperates to draw back the slide h and the clutch It from the annularrecess h in the hub, so that the clutch h will engage theclutch-projection h on the hub, and thus cause the shaft E to revolvewith the gear-wheel 71". The shaft B is driven from the shaft E by meansof the spurgears K and K, fixed to said shafts respective y, and theinclined shaft 1), on the end of which the bush is secured, is drivenfrom the shaft B by means of the spur-gears 7s and 7;, the teeth ofwhich are cut slightly askew to accommodate them to the inclination ofthe shaft D. The shaft G, to which the camwheel G- is secured, is drivenfrom the shaft 13 by means of the bevel-gear k on the shaft B, whichmeshes with a bevel-gear, 75, on the upright shaft is, which is providedwith a worm, 70', that meshes with a worm-wheel, k, on the cam-shaft G.f

To facilitate the operation of the machine, the shaft E, to which thereversing-screw E is secured, is timed to make two revolutions to one ofthe shaft B, to which the leadingscrew bis secured, so that the backwardre- Ice ciprocation of the tool -holder is effected in l dle to bethreaded, a leading-screw and folhalf the time of its forward movementwhen the work is being done.

Theshaft O, on which the tool-holder 0 reciprocates and rocks slightly,is a mere stationary shaft or guide. If preferred, this shaft may beloose in its bearings, so as to rock and reciprocate therein, and thetool-holder be secured rigidly to it.

i In order to adjust the cutting-tool and toolholder to bushes ofdifferent thicknesses or eX- terior diameters, I make the leg orprojection g, which fits against the cam-faces g, adjustable on thetool-holder. The leg is therefore formed on a separate block, M, whichis secured to the tool-holder by bolts m, one of which passes through ahole and the other through a slot in said block, so that said block maybe raised or lowered by means of the setscrew on.

I claim 1. In a thread-cutting machine, thecombination of reciprocatingpivoted tool-holder G and tool mounted thereon, with inclinedchuck-spindle D, for the conical article to be a threaded, theinclination of said spindle to the shaft or line on which saidtool-holder reciprocates being the same as the inclination of theconical surface ofsaid article to its axis, so that said tool willreciprocate in a line parallel to the conical surface of said articlewith out rocking said tool-holder, substantially as specified.

2. The combination of inclined chuck-spindle D, with a cutting-toolmounted on toolholder 0 reciprocating in a line parallel to the surfaceof the conical article to be threaded held on said chuck-spindle, andscrews and followers for reciprocating said holder back and forth tomake successive cuts, and cam having a series of operating-faces-onehigher than the otherfor rocking the tool-holder to increase the depthof cut at each successive cut until the thread is completed,substantially as specified.

3. The combination of an inclined chuckspindle with a cutting-tool and areciprocating pivoted tool-holder provided with a follower, aleading-screw engaging with said follower to produce the forwardreciprocation of the tool-holder, a reversing-screw, and a follower onthe tool-holder adapted to engage with said reversing-screw and cam formoving the toolholder alternately in contact with said leading andreversing screws, substantially as specified.

4. The combination of inclined revolving lower secured to saidtool-holder, and adapted to engage with said leading-screw when theforward reciprocation is made, and a camwheel provided with a series ofoperatingfaces for rocking said tool-holder so as to present the tool toits work, and at the same time cause said follower to engage with thelead ing-screw, said operating-faces being graduated so as to cause thetool to cut deeper at each successive cut as the camwheel revolves,substantially as specified.

6. The combination of inclined revolving spindle D, provided with achuck for holding the conical article to be threaded, with reciprocatIngpivoted tool-holder 0, provided with thread-cutting tool 0, andcam-wheel G, provided with series of operating-faces g, for holding thetool in contact with its work, said opcrating-faces being graduated soasto cause the tool to cut deeper at each successive cut, substantiallyas specified.

7. The combination, with an inclined revolving spindle provided with achuck for holding the conical article to be threaded, of athread-cutting tool, a tool-holder, leading-screw. and follower forreciprocating the tool-holder in a line parallel to the conical surfaceof the article secured upon said chuckspindle to be threaded, and acam-wheel pro vided with a series of operating-faces-onc higher thananotherfor holding the tool in contact with its work so as to cut deeperat each successive cut, the length of said operatingfac'cs beingadjustable to adapt the machine to thread conical articles of differentlengths, substantially as specified.

8. The combination,with an inclined revolving spindle provided with achuck for holding the conical article to be threaded, of a threadcuttingtool, a tool-holder, screws and followers for reciprocating saidtool-holder back and forth in a line parallel to the conical surface ofthe article secured upon said chuckspindle to be threaded, a cam-wheelprovided with a graduated series of operating-faces to rock thetool-holder at each successive cut and hold the tool to its work, and acam or projection on the side of said wheel for operating a clutch tostop the machine when the thread is completed, substantially asspecified.

9. In a machine for cutting threads upon conical articles, thecombination of a reciprocating rocking tool-holder with a cam-wheelprovided with a series of operating-facesone higher than the other-forholding the tool in contact with its work so as to cut deeper at eachsuccessive cut, said cam-wheel having also notches or spaces g betweensaid operating-faces, to permit said tool-holder to rock and withdrawthe tool from its work at the end of each successive cut, substantiallyas specified.

10. In a machine for cutting threads upon conical articles,the'combination of a reciprocating rocking tool-holder with a cam-wheelprovided with a series of operating-faces-one ICO higher than theother-for holding the tool in contact With its Work so as to cut deeperat each successive cut said cam-wheel or its operatingiaces being splitor divided into two parts, so that the length of said operatinglaces maybe extended to adapt the machine to thread articles of differentlengths, substantially as specified.

11. The combination of rocking tool-holder 0, provided with adjustableblock M, having leg or projection g, cam-wheel G, provided withoperating-faces -0ne higher than another-and intervening spaces 9substantially as specified.

12. The combination of tool-holder 0, provided with projection g, withcam-wheel G, provided with operating-flees 9, having sliding part 9, sothat said operating-faces may be extended, substantially as specified.

JOHN J. CLAUSE.

Vitnesses:

H. M. DIUNDAY, EDMUND ADOOCK.

